introduction to density
TRANSCRIPT
1. The metric unit for mass is?
2. Which form of matter has particles that are free to move independently and collide frequently?
3. Which variable is usually is represented by the x-axis in a data table?
4. Give 2 unit labels for volume.
5. Physical changes to matter do not change what?
6. When CO2(s) changes state directly into a gas without becoming a liquid, we call this______________.
7. Which form of matter has both crystalline and amorphous structures?
8. Plant leaves lose water through evaporation – physical or chemical? Why?
9. Proteins are made from amino acids – physical or chemical? Why?
10. Food is digested – physical or chemical?
11. Which Law states that Mass can neither be created or destroyed?
10. What method would you use to find the volume of a block of wood?
11. What are 3 equivalent formulas for finding the volume of a cube?
12. What are the 3 equivalent units of measurement for volume of an object?
13. When will a substance float in water?
14.What is the vocabulary word for finding the volume of an irregularly shaped object?
A substance’s density is the measure of the mass of material within a certain volume. (amnt of space taken up)
The mass (amnt of particles) is affected by how tightly packed the molecules are within the space.
A B
A and B = SAME VOLUME (same size)
A B
A and B = SAME VOLUME (same size)
A B
A and B = DIFFERENT MASS (amount of particles; different substance)
Different Densities
C D
C and D = DIFFERENT VOLUME (different size) but same substance
C D
C and D = DIFFERENT VOLUME (different size) but same substance
Same Densities-
particles are packed the
same way
1. VOLUME – amount of space
• mL, cm3, cc
2. DENSITY – how the particles are packed- RATIO
• g/mL , g/cm3, g/cc, kg/m3
3. MASS – amount of particles
• Any gram unit
Turn to the back of your handout – blank page
Sample Chemical Symbol
Density g/cm3
Physical Attribute
Lead Pb 11.3 Heaviest Mass
Copper Cu 8.9 Orange
Iron Fe 7.9 Magnetic/Rusts
Brass Cu & Zn 8.6 Yellow
Aluminum
Al 2.7 Lightest Mass
Zinc Zn 7.1 Dull Gray
You will need this chart to ID substances.
Substance Mass (g)
Volume (cm3)
Density(g/cm3)
4. Cube 1= _________
5. Cube 2 = _________
6. Cube 3 = _________
7. Cube 4 = _________
8. Cube 5 = _________
9. Cube 6 = _________
Sample Chemical Symbol
Density g/cm3
Physical Attribute
Lead Pb 11.3 Heaviest Mass
Copper Cu 8.9 Orange
Iron Fe 7.9 Magnetic/Rusts
Brass Cu & Zn 8.6 Yellow
Aluminum
Al 2.7 Lightest Mass
Zinc Zn 7.1 Dull Gray
Copy chart onto Cornell Notes
1. THINK about the concepts of VOLUME, DENSITY and MASS.
2. Circle same or different.
3. Explain WHY.
1. THINK about the concepts of VOLUME, DENSITY and MASS.
2. Circle same or different.
3. Explain WHY.
#5. Objects A and B have the same or different densities because
Iron Iron
A B
They are the same substance & the particles are packed the same way
1. Identify the type of numbers you have. (unit labels)
2. Understand what the problem is asking.
3. It is a one step problem or two step problem?
4. Which formula should you use?
The following formulas are for finding different variables in density problems.
m mv D= =
= D vxm
D v
1. Introduction to Density + Problems due tomorrow.